How do I use an authentication app for two-factor authentication?

When you turn on two-factor authentication, you're asked to choose either text message (SMS) codes or a third-party authentication app as your primary security method. A third-party authentication app (such as Duo Mobile or Google Authenticator) can be used to generate login codes that help us confirm it's you when you log in from a new device for the first time.

To use a third-party authentication app for login codes:

Go to your profile and tap .

TapSettings.

Tap Privacy and Security and scroll down to tap Two-Factor Authentication.